package homwork4_8.dao;

import java.sql.*;

public class BaseDao {
    protected Connection con ;
    protected PreparedStatement ps;
    protected ResultSet rs;

    public void setConnection(){
        try {
            Class.forName("com.mysql.jdbc.Driver");
            this.con = DriverManager.getConnection("jdbc:mysql://localhost:12345/db?characterEncoding=utf-8",
                    "root","lovo");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 关闭连接
     */
    public void closeConnection(){
        try {
            if(rs != null) {
                rs.close();
            }
            if(ps != null){
                ps.close();
            }
            if(con != null){
                con.close();
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
    public void update(String sql ,Object...valueArray){
        this.setConnection();
        try {
            ps = con.prepareStatement(sql);
            for(int i=0;i<valueArray.length;i++){
                ps.setObject(i+1,valueArray[i]);
            }
            ps.executeUpdate();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
         finally {
            this.closeConnection();
        }
    }
}
